xiangguo_li@hotmail.com wrote:
hello,
under U-Boot, some board configuration files contain "flattened device tree" elements, such as "OF_CPU", "OF_STDOUT_PATH", etc. while in booting Linux, a separate file dtb is used.
if both are used, what's the relationship about them?
thanks.
-lxg
Processor and board are???
I believe your question is indicating that you are using an older version of u-boot with "CONFIG_OF_FLAT_TREE" defined. This has been deprecated and has been removed in the latest u-boot. The current code no longer defines or uses "OF_CPU", "OF_STDOUT_PATH", etc.
Please update your u-boot and switch to using CONFIG_OF_LIBFDT and dts files from a recent version of the linux kernel source (or edit your dts file to pick up the improvements shown in the linux version).
Don't forget to include an /aliases node pointing to the proper hardware configurations. The u-boot code now uses that to find the fdt pieces for its fixups rather than "OF_CPU", "OF_STDOUT_PATH", etc.
Best regards, gvb